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WO1991014251A1 - Etiquette en polyethylene et procede de fabrication - Google Patents

Etiquette en polyethylene et procede de fabrication Download PDF

Info

Publication number
WO1991014251A1
WO1991014251A1 PCT/JP1991/000308 JP9100308W WO9114251A1 WO 1991014251 A1 WO1991014251 A1 WO 1991014251A1 JP 9100308 W JP9100308 W JP 9100308W WO 9114251 A1 WO9114251 A1 WO 9114251A1
Authority
WO
WIPO (PCT)
Prior art keywords
label
film
bottle
printing
polyethylene
Prior art date
Application number
PCT/JP1991/000308
Other languages
English (en)
Japanese (ja)
Inventor
Yasushi Itaba
Yutaka Yoshifuji
Original Assignee
Tonen Chemical Corporation
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Tonen Chemical Corporation filed Critical Tonen Chemical Corporation
Publication of WO1991014251A1 publication Critical patent/WO1991014251A1/fr

Links

Classifications

    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F3/00—Labels, tag tickets, or similar identification or indication means; Seals; Postage or like stamps
    • G09F3/04—Labels, tag tickets, or similar identification or indication means; Seals; Postage or like stamps to be fastened or secured by the material of the label itself, e.g. by thermo-adhesion
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24479—Structurally defined web or sheet [e.g., overall dimension, etc.] including variation in thickness
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24802—Discontinuous or differential coating, impregnation or bond [e.g., artwork, printing, retouched photograph, etc.]
    • Y10T428/24851—Intermediate layer is discontinuous or differential
    • Y10T428/24868—Translucent outer layer
    • Y10T428/24876—Intermediate layer contains particulate material [e.g., pigment, etc.]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/28—Web or sheet containing structurally defined element or component and having an adhesive outermost layer
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/28—Web or sheet containing structurally defined element or component and having an adhesive outermost layer
    • Y10T428/2848—Three or more layers

Definitions

  • the present invention relates to a label made of polyethylene and a method for producing the same, and in particular, to a plastic bottle to be attached to a plastic bottle, particularly for use in displaying contents.
  • the label from Isolem and its preparation.
  • labels that are attached to containers such as plastic bottles and used to display the contents are those that are printed on the surface of paper or synthetic paper. Yes.
  • plastic bottons When plastic bottons are used as plastic bottons, it is not necessary to remove the labels at the time of collecting and recycling bottons.
  • plastic labels have the advantage that they are resistant to water wetting.
  • the bottle is made of polyethylene and the label is also made of polyethylene, it will be made of the same material. The above advantages can be further exploited-.
  • blow molding is a molding method in which the interior is hollowed by blowing air.At this stage, thermoplastic resin is plasticized by an extruder, and the parison is extruded. During blow molding, the label is held in the mold by holding it in the mold, blowing air inside to expand, and pressing against the inner wall of the mold to cool it. If the label can be attached to the surface of the bottle at the same time as the blow molding of the bottle, troublesome label attaching work can be omitted.
  • the label for this application (in-mold label) is attached to a curved surface of the bottle, the label retains its shape. In other words, it is necessary to have good shapeability and to have excellent strength, transparency and rigidity.
  • the inventor of the present invention first prints on one side of a polyethylene stretched finolem having the degree of cross-linking reduced inward in the thickness direction of the film, and prints the printed surface.
  • a Polyethylene label with an adhesive layer Provided a Polyethylene label with an adhesive layer
  • the label is transparent, printable on the back,
  • the round container itself gives a sense of unity and high quality as if it were printed on a curved surface.
  • it was not necessary to peel it off during recovery recycling it was suitable as a label for immolding that can be attached to the bottle at the same time as the blow molding of the bottle. If such a label is to be applied to the surface of a bottle during molding of an in-mold blower, the label adhesive (searant), especially its shape If the extrusion is performed by an extrusion core using a low-density polyethylene, etc., it is difficult to completely bleed the air.
  • the fact that the Lister (BLISTERS) phenomenon is likely to occur is a matter of earnest study by the present inventors. Was Tsu divided.
  • the present invention like the label proposed above, is transparent and can be back-printed, gives a sense of unity and luxury as if the round container itself was printed on a curved surface, and even if the contents are spilled.
  • the print does not disappear or break, it is rigid and strong, can be thinned, is resistant to water and contamination, and can be recycled in the case of a polyethylene bottle. It does not need to be peeled off from time to time, for example, it is suitable as a label for immolding that can be attached to a bottle holder at the same time as blow molding of the bottle during blow molding. Its purpose is to provide a label made of polyethylene.
  • the present invention also provides a method for preventing the label having the above-mentioned advantages from being scratched and blistered when the label is adhered to the surface of a bottle in the case of the molded blow molding.
  • the goal is to solve it.
  • the present invention improves the label proposed earlier, and when a printing surface is provided with an adhesive layer, a polyelectrolyte having excellent adhesive strength between a printing ink and an adhesive. Disclosure of the invention for the purpose of providing Ren labels
  • the degree of crosslinking is in the thickness direction of the film.
  • Adhesive that has been printed on one side of the polystyrene stretched finolem that has fallen to the inside, and has an uneven surface on that printed surface or on the other surface that has not been printed.
  • the layer is provided with a polystyrene label, and in a preferred embodiment, the irregularities are different from the embossed pattern, or It is provided by dot coating, and furthermore, a primer layer is provided on the printing surface, and the above-mentioned bonding is performed on the primer surface. It is present on the label made of polyethylene with the eyebrows.
  • the present invention provides printing on one side of a polystyrene stretched finole having a degree of cross-linking reduced inward in the thickness direction of the film, and printing the printed surface or printing.
  • the adhesive layer is provided by extrusion coating on the other side that has not been subjected to embossing
  • the coating film after extrusion may be embossed.
  • the coating film is extruded onto a chill roll having a turn, and the coating film is embossed with irregularities.
  • the method of producing a polystyrene label which is characterized by applying a turn, and the degree of cross-linking decreases inward in the thickness direction of the film.
  • the method of producing a polystyrene label is characterized by forming an adhesive layer with irregularities by applying
  • the polystyrene stretched finolem used in the present invention in which the degree of cross-linking is reduced inward in the thickness direction of the film, may be, for example, on either side of a polystyrene resin-based raw sheet.
  • the degree of cross-linking of a specific structure such as, for example, both surface layers being cross-linked but the intermediate layer being uncross-linked (e.g., can be expressed by gel fraction) )
  • the transparency is higher than that of ethylene, but on the other hand, it is possible to print on the back side, and the label made of the above unique back-printed polyethylene film, especially a cylindrical bottle When attached to a file, the transparency is high and the printing surface clearly emerges Therefore, even though the film is printed, there is a sense of unity as if the bottle itself was printed on a curved surface, and it could also give a sense of quality. I found out what I can do.
  • the label does not include the characteristics of the finorem. Since it is rigid, transparent, strong and can be labeled with a thin wall, it is made of Polyethylene, printed on the back side, and has an adhesive layer. When a bottle made of len is blow-molded, for example, the label is set in the blow-molding mold of the bottle. The blow molding surface of the towel is bonded to the adhesive layer surface of the label, and it can be suitably used as an in-mold label. If it is used, it is close to the same material as the bottle, so there is an advantage that it does not need to be peeled off at the time of recovery recycling. Resistant to water and contamination, and easily wipes off water and dirt from the label surface Can be obtained. In addition, mold will not be removed and cleanliness will appear for sanitary applications.
  • the adhesive is provided with irregularities, and the sealant is extruded onto the printing surface and coated. Embossing the extruded coating film, or a chill roll that has a pattern when extruded.
  • the coating film to give an uneven emboss pattern so that air can be completely removed.
  • the printing surface of the film is brought into contact with the rotating dot roll to which the adhesive is attached, and the dot coating is performed on the printing surface.
  • the adhesive is transferred to form the adhesive layer having irregularities by applying a label to the surface of the bottle. Can be solved when the resin is adhered to the surface of the bottle during the molded molding, and the blister phenomenon can be solved.
  • the primer layer is interposed between the printing layer and the adhesive layer, so that the porch having excellent adhesive strength between the printing ink and the adhesive is provided.
  • the label can be made from len.
  • FIGS. 1A to 1B are cross-sectional views showing various embodiments of the label of the present invention
  • FIG. 2 is a front view showing an example of a use mode of the present invention
  • FIG. 3 is a view of the present invention. It is explanatory drawing of the blow molding process using an in-mold label.
  • the label of the present invention which explains this based on the embodiment shown in the accompanying drawings, is a plastic (polyethylene) bottle 1 as shown in FIG. It relates to label 2 used for purposes such as sticking on to a label and displaying its contents.
  • Fig. 1A shows an example of the cross section of the configuration of the label 2.
  • the label 2 shown in FIG. 1A is a polystyrene stretched film (hereinafter referred to as a BOPE film) in which the degree of crosslinking decreases inward in the thickness direction of the film.
  • a BOPE film polystyrene stretched film
  • This is a label formed by printing 4 on one side (back side) of the sheet and providing an adhesive layer 5 on the printing side.
  • the label 2 shown in FIG. 1A has an adhesive layer 5 directly laminated on the printing layer 4 without the intermediary of the primer layer, and the adhesive layer 5 has unevenness 5. 0 is formed.
  • the B0PE finale 3 has a density of 0.935 or more and a melt index (measured in accordance with JISK6706, temperature 190 ° C, load 2.16). (measured in kg, hereinafter referred to as MI)) consists of 0.5 to 20 g / 10 minutes of polyethylene. It is preferable that the crosslinked layer Z has an uncrosslinked layer and a Z crosslinked layer in the thickness direction.
  • a biaxially stretched film having an area ratio of 9 times or more is preferable as the desired label of the present invention.
  • the gel fraction was determined by extracting the sample with boiling P-xylene.
  • the thickness of the finolem 3 is usually about 10 to 100 mm.
  • the printing on the B0PE finale 3 can be performed by, for example, gravure printing, offset printing, flexographic printing, or screen printing. Yes o Before printing, it is preferable to subject the B0PE finale 3 to corona discharge treatment. For printing ink, it is preferable to use ⁇ -based ink.
  • the adhesive constituting the adhesive layer 5 includes low-density polyethylene (LDPE), linear low-density polyethylene (LLDPE), and ethylene monoacetate vinyl copolymer. Coalescence (EVA), ethylene-ethyl acrylate copolymer (EEA), and other ethylene copolymers Various types of materials such as body or denatured products, acrylic and urethane adhesives can be used, especially in blow molding of bottles. In the mold, it is preferable to use a material that can be heat-bonded to a single-piece molding bottle.
  • Extrusion Coating When embossing or extruding 5 surfaces of a coating film such as LDPE, which has been coated with LDPE, using an embossed hologram. Then, the coating film is extruded onto a chill roll having a certain pattern. The coating film (silent film) 5 is evacuated, crushed, and bleached by the emboss pattern 50 applied thereto. The star phenomenon can be eliminated.
  • the energy boss pattern 50 may be anything as long as the phenomenon can be avoided, for example, a tortoiseshell shape. It is composed of a turn (Hexagonal Pattern).
  • the latter method is preferred for keeping the surface of the label smoother.
  • Agent layer 5 The following describes the method of breaking.
  • the surface of the rotating dot roll is divided into triangles, squares, or turrets, etc., and a rack is attached to the roll surface to rotate the roll. Bring the label and the label into contact with each other, and apply a label to the label surface with irregularities. That is, for example, the roll surface is divided into a triangular truncated cone, a truncated pyramid, a truncated pyramid, etc. by a line having a depth of 120 mm and a number of lines of 55 lines and a width of Z inches.
  • the solid lacquer material is dissolved in an organic solvent (ethyl acetate, tolene, MEK, alcohol solvent, etc.) and the temperature is 50 ° C and 50 CPS (centibo Adjust the viscosity so that it adheres to the surface of the roll and, while rotating, contact with a Polyethylene label to transfer. , Coat with uneven surface on the label surface.
  • an organic solvent ethyl acetate, tolene, MEK, alcohol solvent, etc.
  • 3 is a polyethylene stretched film (BOPE film) in which the degree of cross-linking decreases in the thickness direction of the film
  • 4 is the BOPE film.
  • the printed layer 5 provided on one side (back side) of the film is an adhesive layer
  • 6 is a primer layer interposed between the printed layer 4 and the adhesive layer 5.
  • 7 is a label surface protective layer (scraper). (Coat layer) to protect the label surface, such as to prevent the label surface from being scratched. For example, a nitroselorose-based label is used.
  • the primer 6 uses a primer composed of a combination of chlorine polypropylene (C £ -PP) and ethylene vinyl acetate copolymer (EVA). Is preferred.
  • the adhesive constituting the adhesive layer 5 provided on the side of the primer layer 6 includes an ethylene monoacetate vinyl copolymer system or a modified product thereof, an acrylic system, and a c. Although various types of adhesives such as lanthanated adhesives can be used, especially in the blow molding of bottles, they can be heat-bonded to the one-piece molding bottle in the mold. Are preferred.
  • a bonding agent is applied to the primer surface 6 of the finolem 3 by a roll or the like. The method of extrusion coating is exemplified.
  • the adhesive layer 5 of the label according to the present invention is the first B U
  • the thickness of label 2 can be appropriately selected according to the application, but is usually about 50 to 130.
  • the label 2 obtained as described above can be simultaneously adhered to the bottle surface in the mold at the time of the bottle forming by the one-piece molding.
  • the extruder 8 is used to convert a polystyrene polyethylene tube, which is in a softened state, into a cylindrical shape.
  • the mold is extruded from the die 9, then the molds 10 and 11 are closed, and the blow pin (air blow section) 12 is used to close the mold. Air is blown into the lithon to expand the pallon along the inner surface shape of the molds 10 and 11, and after cooling, the molds 10 and 11 are opened and Remove Tosole 1.
  • the label 2 should be set in one of the molds 10 and 11. In the figure, after removing the bottle 1 to which the label 2 has been attached, the label 2 is set in the mold 11 and the process is circulated. Yes.
  • the present invention is not limited to the case where the printing is performed on the back of the finolem (the front printing is performed).
  • the adhesive layer is provided on the side by extrusion coating, do not print on the rotary dot holder to which the adhesive is attached.
  • the back side of the film (surface printing is applied) is contacted, and the adhesive is transferred to the back side by dot coating to form the adhesive layer. It is also applied when performing
  • Example 1 Example 1
  • the film was stretched by X6 to obtain a 20 / thick biaxially stretched physolem (B0HD physolem). This finale had a haze of 2.7% and a moisture permeability of 3.6 g / m 2 / 24hrs.
  • embossing was applied to the LDPE surface using an embossed holster, and air was removed from the coating film.
  • the coating film is extruded onto a chinorole having a pattern (manufactured by Fujikoshi Co., Ltd.) so that the coating film is extruded.
  • a turtle-shaped embossed butter for air-venting.
  • the obtained label is set in a mold for blow molding, and a bottle having a capacity of 200 m £ is blow-molded from high-density polyethylene. Both were pasted on the bottle surface and used as labels for immolding.
  • the resulting bottle label had a sense of unity, as if the back printing was clear or if the bottle itself was printed on a curved surface. It was able to wipe off even water and dirt, and there was no dirt or damage.
  • Electron beam crosslinked raw sheet molded from high-density polyethylene (density 0.957 g / cm 3 , MI 1.0 g / 10 min) (gel fraction (%) cross-linked layer Z
  • Cross-linked layer Z cross-linked layer 50/0 X 50
  • the BOHD film surface was subjected to a corona discharge treatment, and the treated surface was subjected to four-color gravure printing using a perforated ink.
  • an EVA-based rack-(Toyo Motor Co., Ltd.-33W1790) is used for dot-coating. More 5 g / m 2 was applied.
  • the surface of the roll used for dot coating is a line with a depth of 120 and a number of lines of 55 Z inches, which is divided into truncated triangular pyramids. I was. Next, after drying, it was cut into a shape of 10 O mm in length and 60 mm in width to be labeled. The obtained label is set in a mold for blow molding, and high density polyethylene is used as a raw material. Then, a bottle with a capacity of 500 m was blow-molded and attached to the bottle surface to use it as an immobilized label.
  • the resulting bottle label had a sense of unity, as if the back printing was clear or if the bottle itself was printed on a curved surface. It was able to wipe off even water and dirt, and there was no dirt or damage. When I observed Bliss Evening, I did not see any Blister phenomena.
  • a urethane-based ink is disposed on the treated surface. 4 color gravure printing.
  • the printed surface of this B0HD film K was coated with a primer having the following composition.
  • Example 1 8 Wt% Tonolene 59 9% MEK 11.5% Acetanol acetate 6.5% Isopropizoleyl 3.0% Others 2.0% Then, as in Example 1, Then, an adhesive layer was provided, a label was obtained, and this was used as an immobilized label.
  • the adhesive strength is higher than when an adhesive is directly provided on the printing surface.
  • the film was stretched to obtain a 5 ⁇ ⁇ -thick biaxially stretched final film (BOHD film). This finale had a haze of 2.7% and a moisture permeability of 3.6 gZm 2 Z 24 hrs.
  • the BOHD film surface was subjected to a corona discharge treatment, and the treated surface was subjected to four-color gravure printing using a urethane ink.
  • a primer having the following composition was applied to the printed surface of this B0HD finenorm.
  • EVA lacquer adhesive on the primer surface 5 g / m 2 was cut into a shape of 10 O mmx and 6 O mm in width to make a label.
  • a label is set in a blow molding die, and a high-density polyethylene is used as a raw material, a bottle with a capacity of 500 m is blow-molded. It was attached to the bottom of the bottle and used as an in-mold label.
  • the resulting bottle label provided a sense of unity as if the back printing was clear or the bottle itself was printed on a curved surface. Wipes and dirt could be wiped off, and no dirt or damage was found.
  • the adhesive strength is increased as compared with the case where the adhesive is directly provided on the printing surface, and the peeling strength when the adhesive is directly provided on the printing surface is 1. It was 10 g / I 5 mm, while it was 10 g / 15 mm.
  • the label of the present invention can be used as a label for various applications because of the characteristics as described above, the label is an in-mold label as shown in the above embodiment. It is suitable.
  • polystyrene label of the present invention can be used not only in blow molding but also in other molding methods, for example, injection molding.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
  • Details Of Rigid Or Semi-Rigid Containers (AREA)

Abstract

Etiquette fabriquée avec un film de polyéthylène étiré ayant un degré de réticulation se réduisant vers l'intérieur dans la direction de l'épaisseur du film; l'étiquette a une impression sur un côté et comporte également une couche d'adhésif. Elle a une transparence excellente, peut recevoir une impression sur le revers pour donner cette impression d'unité et de grande qualité résultant d'une impression directe sur la surface bombée d'un récipient circulaire; elle est rigide et assez résistante pour permettre une réduction de l'épaisseur, elle résiste au mouillage ou aux souillures, n'a pas besoin d'être exfoliée quand une bouteille en polyéthylène est recyclée. Cette étiquette convient à la décoration en creux, car elle peut être collée sur la bouteille au moment du soufflage; la couche d'adhésif étant rugueuse, l'air est purgé pour éliminer les ampoules qui se forment quand l'étiquette est collée sur la surface de la bouteille au moment du soufflage avec l'impression en creux, et une couche de fond est formée entre l'encre d'impression et les couches adhésives. On obtient ainsi une étiquette ayant une adhérence excellente.
PCT/JP1991/000308 1990-03-07 1991-03-07 Etiquette en polyethylene et procede de fabrication WO1991014251A1 (fr)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
JP2/53544 1990-03-07
JP5354590 1990-03-07
JP2/53546 1990-03-07
JP5354690 1990-03-07
JP2/53545 1990-03-07
JP5354490 1990-03-07

Publications (1)

Publication Number Publication Date
WO1991014251A1 true WO1991014251A1 (fr) 1991-09-19

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP1991/000308 WO1991014251A1 (fr) 1990-03-07 1991-03-07 Etiquette en polyethylene et procede de fabrication

Country Status (4)

Country Link
US (1) US5227233A (fr)
EP (1) EP0471854A4 (fr)
CA (1) CA2054753A1 (fr)
WO (1) WO1991014251A1 (fr)

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EP0471854A1 (fr) 1992-02-26
CA2054753A1 (fr) 1991-09-08
US5227233A (en) 1993-07-13
EP0471854A4 (en) 1993-09-01

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